Verz, The Dullahan

Whenever a creature dies, put a +1/+1
counter onto Verz, The Dullahan.
{2}{u}{u}{b}{b} and Remove three +1/+1 counters
from Verz, The Dullahan : Make a token
copy of target creature from your graveyard
with the same abilities, power and toughness.
You may only use this ability only when you are
able to cast a sorcery.